Buffer overflow in Cmu Panda3d
CVE-2026-22189
The egg-mkfont utility in Panda3D versions up to and including 1.10.16 contains a stack-based buffer overflow vulnerability due to use of an unbounded sprintf() call with attacker-controlled input. When constructing glyph filenames, egg-mkfont formats a user-supplied glyph pattern (-gp) into a fixed-size stack buffer without length validation. Supplying an excessively long glyph pattern string can overflow the stack buffer, resulting in memory corruption and a deterministic crash. Depending on build configuration and execution environment, the overflow may also be exploitable for arbitrary code execution.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (35.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cmu Panda3d
- Panda3d — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Mailing List, Third Party Advisory, exploit)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-22189?
- CVE-2026-22189 is a critical-severity vulnerability in Cmu Panda3d, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-01-07.
- How severe is CVE-2026-22189?
- Critical severity. CVSS v3 base score is 9.8 out of 10.